I added it into the Header.php:
<blockquote><meta http-equiv="Content-Type" content="<?php bloginfo('html_type'); ?>; charset=<?php bloginfo('charset'); ?>" />
<title><?php if( is_search() ) { $ser = $_GET['s']; ?><?php _e('Search'); ?><?php echo " "" . wp_specialchars($ser, 1) . """; } ?><?php wp_title(''); ?><?php if( ! is_home() ) { ?> | <?php } ?><?php bloginfo('name'); ?><?php bloginfo('description'); ?></title></blockquote>
But it still didn’t work. Is there another file I should be hacking?
Yes the title and tagline are written in options. And the the blog title appears in the browser’s top bar, but I also want the tagline to be in the browser’s top bar. There’s no option for that.